Artificial tarns



Reissued June 22, 193? I; Re. 20,417 v METHOD TREATING NATItTRAL AND ARTIFICIAL YARNS John Marshall 1100c, South Hadley, Mass.

No Drawing. Original No. 2,050,325 dated August 11, 1936, Serial No. 604,647, April 11, 1932. Ap- "plication for reissue May 4, 1937, Serial No.

15 Claims. (Cl. 117-2) winding from the spinning room bobbins to spools This invention relates to improvements in the methods of setting the twist of rayon yarn,

- whereby it becomes possible to spin the yarn directly onto weaving or shuttle bobbins, without the necessity of rewinding it to other carriers as a result bf the yarn becoming soft or loose on 'the bobbins, due to'a twist-setting operationg,

thereby eliminating time, expensive machinery and a high labor cost. Yarns having the twist set by my methods will not have to be kept in a conditioning atmosphere. It also applies to the setting of the twist of rayon yarn spun onto intermediate bobbins, or carriers, from which it must later be rewound onto weaving or shuttle bobbins, v or to other carriers; such rewinding not being necessary because of faulty twist-setting, but simply to get the yarn onto a more convenient carrier. It also applies to the setting oi the twist of cotton, wool, real silk, cellulose acetate, and other natural or artificial fibres spun directly onto weaving or shuttle bobbins, or onto intermediate bobbins for a later rewind onto suitable carriers; 7

it also applies to the preparation of the yarn with the materials used previous to spinnig and then spinning directly onto weaving or shuttle bobbins, or onto intermediate bobbins, the yarn, after spinning requiring no after-treatment to set the twist, when properly prepared, before spinning.

Yam properly treated by my process will be firmly and tightly wound on the bobbin, or other carrier to which it has beentwlsted and will not require a rewind becauseit is not firm or tight. Moreover, said yarn will not soften, or become loose during the storage. Any rewindingrequired will be for the purpose of transferring the yarn to a more convenient form of carrier and not because v i of the yarn becoming loose, as the result of the twist-setting? Another feature of myimprovement is that the twist-setting materials can be recovered and re-used.

the present time, consists in preparing it for spinning by employing a preliminary treatment, as sizing, waxing, oiling, or other treatment, then passing it through the spinning process and winding it onto bobbins, "not weaving or shuttle bobbins, The yarn on the bobbin is now too lively,

due to tendency to kink, to be'handled and the twist must beset before the yarn can be further starches, dextrines, oils, waxes, by steaming, or by a combination of materials. The treated yarn is The usual method in spinning rayon yarn, at,

-or shrink, or become dampchanges.

processed. This is accomplished in several ways; by means of water or water solutions of gums,

on spooling machines, and then winding from spools to the weaving or shuttle bobbins on expensive winding machines. The cost of twist-setting and rewinding is high and my process is designed to eliminate much' of the expense.

When rayon yarn is spun directly from a spinning frame onto weaving or shuttle bobbins and the twist set by the methods in use at the present time, such as immersing the yarn in water, or in water solutions of gums, oils, waxes, starches, dextrines, etc., or steamed, the yarn, especially in storage; may swell and soften so that in some cases the bobbin can be pulled away from the I yarn. Such-bobbins cannot be used for weaving. Claims aremade that the yarn doesnot swell, but

that the bobbin dries out. I' claim, for myimproved process, that it will remedy the trouble,

gwhatever the cause. If due tothe bobbin drying,

my treatment will overcome the dimculty for, if a properly conditioned bobbin is used at the start, it becomes coated with a protecting layer of wax, oil, or rosin, or other binder, and would neither dry out nor swell appreciably. Moreover, my

treatment need 'not appreciably alter the natural moisture content of any yarn to which it may be applied, and therefore,,the tendency to swell in storage, due to water take-up, would be minimized. If'the fabric to be treated is'a crepe consisting of a highly twisted filling for instance 50-55 turns per inch per denier 40 filament rayon), and the warp ordinary untwlsted rayon,

and the warp is sized with a mixture similar to that used in setting the twist, the use of expensive humidifying apparatus in weave rooms can be eliminated, and the bobbins and yarn will not be exposed to changes in atmospheric conditions to produce swelling or drying out. My

ment, therefore, consists-in employinfa binder for the yarn which does not cause it to swell, or

soften, and does not permit bobbin to dry out with humidity Y T J The main object of my processis onto weaving or shuttle'bobbins, protection is also clairned'for twist-setting f the some solutions, if intermediate bobbins; are us'e'dr-the yarn being rewolmd onto the shuttle bobbins, un-

less wanted for warp yarn, when "would be made into warp. The twistmay beset in two different ways,'according to one; choice:- r

0. Spin the yarn onto weaving or shuttle bobhim, or other carriers and setthe twist after the spinning operation, by means or chemicals tobe hereinafter mentioned. 1 I

by distillation.

2. In a method of setting the twist of rayon, wool, real silk, cellulose acetate, and cottonyarns, and the recovery for re-use by means of volatile solvents of the materials used in setting the twist as well as the recovery of the volatile solvents comprising, pre-treating the yarn with a mixture of oils, waxes, and rosin, then twisting the yarn onto suitable carriers, and recovering from the woven fabric the oils, waxes and rosin by extraction with volatile solvents and separating said solvents from the twist-setting medium by distillation.

3. In a method of setting the twist of rayon,

mixture of oils, waxes, and rosin, constructing a fabric and extracting from said fabric, the oils, waxes and rosin by extraction with volatile solvents.

4. In a method of setting the twist of rayon, wool, real silk, cellulose acetate, and cotton yarns, and the recovery for re-useby means of volatile solvents of the materials used in setting the twist as well as the recovery of the volatile solvents comprising, pro-treating the yarn with a mixture of oils, waxes, rosin, then twisting the yarn onto suitable carriers, constructing a fabric and extracting from said fabric the oils, waxes and rosin by extraction with volatile solvents.

5. In a method of setting the twist of natural and artificial fibre yarns and the recovery for re-use by means of volatile solvents of the materials used in setting. the twist as well as the recovery of the volatile solvents, the steps comprising twisting the yarns onto a suitable carrier, thensetting the twist with a twist setting medium soluble in volatile solvents, constructing a fabric and extracting said twist setting medium from the fabric by extraction with volatile solvents.

6. In a method of setting the twist of natural and artificial fibre yarns and the recovery for re-use by means of volatile solvents of the materials used in setting the twist as well as the recovery of the volatile solvents, the steps comprising twisting the yarns onto a suitable carrier, then setting the twist with a'twist setting medium soluble in volatile solvents, constructing a fabric and extracting said twist setting medium from the fabric by extraction with volatile solvents and separating saidsolvents from the twist setting medium by distillation.

7. In a method of setting the twist of natural and artificial fibre yarns, and the recovery for re-use by means of volatile solvents of the materials used in setting the twist as well as the recovery of the volatile solvents comprising pretreating the yarn with a twist setting medium soluble in volatile solvents, then twisting the yarn onto suitable carriers, constructing a fabric and.

extracting said twist setting medium from the fabric by extraction with volatile solvents.

8. In a method of setting the twistof natural andartificial fibre yarns, and the recovery for re-use by means of volatile solvents of the ma terials used in setting the twist as well as the recovery of the volatile solvents comprising pretreating the yarn with a twist setting medium soluble in volatile solvents, then twisting the yarn onto suitable carriers, constructing a fabric and extracting said twist setting medium from the fabric by extraction with volatile solvents and separating said solvents from the twist setting medium by distillation.

9. In a method of manufacturing textile fabric the steps which comprise treating yarn with a binder that is soluble in a volatile solvent, constructing a fabric containing said treated yarn, extracting said binder from the fabric by extraction with a volatile solvent of said binder, and separating the binder from the solvent.

10. In a method of manufacturing textile fabric, the steps which comprise treating yarn with a binder that is soluble in a volatile solvent, constructing a fabric containing said treated yarn,

extracting said binder'from the fabric by extrac- 1 12. In a method of manufacturing textile fabric, the steps which comprise treating yarn with a water insoluble binder that. is soluble in a volatile solvent, constructing a fabric containing said treated yarn, extracting said binder from the fabric byextraction with a volatile solvent of said binder,'and separating the binder from the solvent.

13. In a method of manufacturing textile fabric,,the steps which comprise treating yarn with a water insoluble binder that is soluble in a volatile solvent, constructing a fabric containing said treated yarn, extracting said binder from the fabric by extraction with a volatile solvent of said binder and distilling the extract to recover both binder and solvent for re-use.

14. In a method of setting the twist of natural and artificial fibre yarns and the recovery for re-use by means of volatile solvents of the materials used in setting the twist as well as the recovery of the volatile solvents, the steps comprising twisting the yarns onto a suitable carrier. then setting the twist with a twist setting medium soluble in volatile solvents, constructing a fabric and extracting said twist setting medium from the fabric by extraction with volatile solvents and separating the binder from the solvent.

- 15. In a method of setting the twist of natural and artificial fibre yarns, and the recovery for re-use by means of volatile solvents of the ma.- terials used in setting the twist as well as the recovery of the volatile solvents comprising pretreating the yarn with a twist setting medium soluble in volatile solvents, then twisting the yarn onto suitable carriers, constructing a fabric and extracting said twist setting medium from the fabric by extraction' with volatile solvents: and 

